الفهرس 
Repair and maintenance costs of trctorsOnly 14 pages are availabe for public view
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Abstract
The percentage distribution for the tractor was 26.32% for Nasr tractors, 18.8% for Ursus tractors and 54.88% for the other tractors such as yanmar, Kubota, Ford, John-Deere and Hinomoto. On the other hand, 20 tractors had ten-years-old (15% of the total), 21 tractors had nine-years-old (15.8% ofthe total) and 92 tractors had age ranged between One-year-old and eight-years-old . Combine harvesters in this study had a cutting width ranged between 90 cm (such as yanmor and kubota) and more than 240cm (such as John-Deere and Deutz). These combines purchased in the period fiom 1984 to 1991 with total accumulated hours ranged fiom 200 to 3000 hours. The maximum age of the combine was eigh-year-old which represented 19% of the total combine harvesters surveyed. It was found that yanmar combine represented (48% of the total) and deutz (20% of the total). All the scrapers were made in Egypt with different working width. The scrapers purchased in the period from 1984 to 1991 with total accumulated hours per unit ranged fkom 350 to 3500 hours. The age of scrapers were ranged from one-yearold (25.35% of the total) to eight-year-old (12.68% of the total). The seed-drills were purchased in the period from 1983 to 1990 with working hours ranged fiom 200 to 3400 hours. Tye seed drills were represented 66% of the total. However, sulky were represented 18% of the total.